我正在尝试在swift中复制此https://jmacmullin.wordpress.com/2010/11/03/adding-meta-data-to-video-in-ios/。
以下是Jake代码的视频......
Objective C Timed Metadat in HLS stream
以下是类似内容的附加链接......
http://cloudfields.net/blog/metadata-audiostream-mpmovieplayercontroller/
当我的视频播放时，元数据应该会更新按钮，以便在点击时重定向到网页浏览中的特定YouTube视频网址。我的视频大约15分钟，有6个定时元数据网址。
我无法在Swift中找到任何关于如何实现此目的的代码或文档。我已经设法将Jake的Objective C代码转换为他的Notification调用。
// Register for meta-data notifications
NSNotificationCenter *center = [NSNotificationCenter defaultCenter];
[center addObserver:self
selector:@selector(metadataUpdate:)
name:MPMoviePlayerTimedMetadataUpdatedNotification
object:nil];
到Swift Code
NSNotificationCenter.defaultCenter().addObserver(
self,
selector: "metadataUpdated",
name: MPMoviePlayerTimedMetadataUpdatedNotification,
object: nil)
杰克的功能
Actor *actor = [[Actor alloc] init];
if ([player timedMetadata]!=nil && [[player timedMetadata] count] > 0) {
for (MPTimedMetadata *metadata in [player timedMetadata]) {
if ([[metadata.allMetadata valueForKey:@"key"] isEqualToString:@"TPE1"]) {
[actor setName:[metadata.allMetadata objectForKey:@"value"]];
}
if ([[metadata.allMetadata valueForKey:@"key"] isEqualToString:@"WXXX"]) {
NSURL *url = [NSURL URLWithString:[metadata.allMetadata objectForKey:@"value"]];
[actor setProfileURL:url];
}
}
}
// display some UI element for the user to interact with
到Swift
func metadataUpdated (notification: NSNotification!) {
if moviePlayer?.timedMetadata != nil && moviePlayer?.timedMetadata.count > 0 {
for MPTimedMetadata in [moviePlayer?.timedMetadata] {
if MPTimedMetadata?.description == ("TPE1") {
let name = ("value")
}
if MPTimedMetadata?.description == ("WXXX") {
var url = NSURL.observeValueForKeyPath("value")
}
}
}
println("Things are kind of working")
}
}
对于我的生活，虽然我无法弄清楚如何将元数据转换为任何可操作的代码。我真的需要创建一个重定向到元数据中携带的URL的按钮，但不能将其转换为String。任何帮助是极大的赞赏。这是我到目前为止所做的。
import UIKit
import MediaPlayer
class ViewController: UIViewController {
var moviePlayer: MPMoviePlayerController?
var youtube = ""
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
let url = NSURL(string: "http://path/to/video.m3u8")
moviePlayer = MPMoviePlayerController(contentURL: url)
if let player = moviePlayer {
player.view.frame = CGRect(x: 0, y: 0, width: self.view.frame.size.width, height: self.view.frame.size.height)
player.view.sizeToFit()
player.scalingMode = MPMovieScalingMode.None
player.movieSourceType = MPMovieSourceType.Streaming
//player.repeatMode = MPMovieRepeatMode.One
player.play()
self.view.addSubview(player.view)
NSNotificationCenter.defaultCenter().addObserver(
self,
selector: "metadataUpdated:",
name: MPMoviePlayerTimedMetadataUpdatedNotification,
object: nil)
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func metadataUpdated (notification: NSNotification!) {
if moviePlayer?.timedMetadata != nil && moviePlayer?.timedMetadata.count > 0 {
for MPTimedMetadata in [moviePlayer?.timedMetadata] {
if MPTimedMetadata?.description == ("TPE1") {
let name = ("value")
}
if MPTimedMetadata?.description == ("WXXX") {
var url = NSURL.observeValueForKeyPath("value")
}
}
}
println("Things are kind of working")
}
}
答案 0 :(得分：3)
所以我让这个工作，但最终沟渠MPMovieController选择AVPlayer。这是我的代码，以及帮助我实现其功能的另一篇帖子的链接。
import UIKit
import MediaPlayer
import AVFoundation
var youtubeRequest: NSURLRequest! = nil
var player : AVPlayer? = nil
var url:NSString!
class ViewController: UIViewController {
var moviePlayer: MPMoviePlayerController?
var movieItem: AVPlayerItem!
var Player: AVPlayer!
var playerLayer : AVPlayerLayer? = nil
var asset : AVAsset? = nil
var playerItem: AVPlayerItem!
var youtubeRequest: NSURLRequest! = nil
@IBOutlet var playButtonOutlet: UIBarButtonItem!
@IBAction func playButtonAction(sender: AnyObject) {player?.play()
playButtonOutlet.enabled = false
}
@IBOutlet var videoView: UIView!
@IBAction func loadURL(sender: AnyObject) {player?.pause()
playButtonOutlet.enabled = true
}
@IBOutlet var urlButton: UIButton!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
urlButton.enabled = false
let videoURL = NSURL(string: "http://path/to/video.m3u8")
playButtonOutlet.enabled = false
movieItem = AVPlayerItem(URL: NSURL(string: "http://path/to/video.m3u8"))
movieItem.addObserver(self, forKeyPath: "timedMetadata", options: nil, context: nil)
Player = AVPlayer(playerItem: movieItem)
var metaArray: Array<Any> = [moviePlayer?.timedMetadata]
asset = AVAsset.assetWithURL(videoURL) as? AVAsset
playerItem = AVPlayerItem(asset: asset)
playerItem = AVPlayerItem(URL: NSURL(string: "http://path/to/video.m3u8"))
playerItem.addObserver(self, forKeyPath: "timedMetadata", options: nil, context: nil)
playerItem.addObserver(self, forKeyPath: "presentationSize", options: nil, context: nil)
player = AVPlayer(playerItem: playerItem)
playerLayer = AVPlayerLayer(player: player)
playerLayer!.frame = videoView.bounds
videoView.layer.addSublayer(self.playerLayer)
player!.play()
NSNotificationCenter.defaultCenter().addObserver(
self,
selector: "rotated",
name: UIDeviceOrientationDidChangeNotification,
object: nil)
}
override func observeValueForKeyPath(keyPath: String, ofObject object: AnyObject, change: [NSObject : AnyObject], context: UnsafeMutablePointer<Void>) -> Void {
if keyPath != "timedMetadata" { return }
var data: AVPlayerItem = object as AVPlayerItem
var urlError = false
for item in data.timedMetadata as [AVMetadataItem] {
println(item.stringValue)
var metaArray: Array<Any> = [playerItem?.timedMetadata]
println("Total objects in array \(metaArray[0])")
var data = item.stringValue
url = NSString(string: data) as NSString!
if url != nil {
urlButton.enabled = true
println("The url is \(url)")
} else {
urlError = true
}
var urlRedirect = NSURL(fileURLWithPath: "\(url)")
println("The url is \(urlRedirect)")
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func rotated()
{
if(UIDeviceOrientationIsLandscape(UIDevice.currentDevice().orientation))
{
self.navigationController?.navigationBarHidden = true
playerLayer?.frame = CGRectMake(0,0,self.view.frame.size.width,self.view.frame.size.height)
playerLayer?.frame = CGRectMake(0,0,self.view.frame.size.width,self.view.frame.size.height)
println("landscape")
}
if(UIDeviceOrientationIsPortrait(UIDevice.currentDevice().orientation))
{
self.navigationController?.navigationBarHidden = false
playerLayer!.frame = videoView.bounds
println("portraight")
}
}
}